"I want you to make me a story up tonight."
"You mean one of my stories that you say are lame?"
"No, something different where something bad happens. And evil things kill the good things."
"I don't want to make up a story like that."
"No. Why would you want me to make up a story like that?"
"I want to be evil".
"But that is not the way the world is supposed to work. Good is supposed to triumph against evil""
"OK, let me tell you the story about a boy called Donald. A cruel and arrogant child who dreamed that one day he would be the most important king in the whole world...
... story told..
...And he was king and did lots of horrible things and they all lived unhappily ever after. There, happy?"
"I didn't mean like that. I meant with an evil tiger."